JP2001140900A - Tapered roller bearing and method of assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tapered roller bearing whose performance and durability are enhanced by enhancing the dimensional and geometrical accuracies of a cage. SOLUTION: The tapered roller bearing 1 comprises: an inner ring 5 having a tapered raceway surface 3 on its outer periphery; an outer ring 9 disposed to surround the inner ring 5 and having a tapered raceway surface 7 on its inner periphery; a number of tapered rollers 11 interposed between the inner ring 5 and the outer ring 9; and the cage 13 made of a steel plate for holding the tapered rollers 11. The cage 13 is manufactured from the steel plate by press molding, with a small-diameter ring portion 21 and a large-diameter ring portion 23 interconnected by a number of column portions 25. In Figure, the sign 27 indicates a pocket into which the tapered roller 11 fits and which is defined by both ring portions 21 and 23 and the column portions 25. The cage 13 has no curl at the end of the small-diameter ring portion 21 and its axial cross section is in the form of a simple straight line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapered roller bearing and a method for assembling the same, and more particularly, to a technique for improving the size and shape accuracy of a cage.

[0002]

2. Description of the Related Art Machines such as machine tools and railcars are known as:
Various rolling bearings have been used to rotatably support a spindle, an axle, and the like. A rolling bearing usually includes inner and outer races (inner and outer rings), a number of rolling elements disposed between the inner and outer rings, and a retainer for preventing contact between the rolling elements and dropping of the rolling elements. ing. For example, in a bearing device for a machine tool, a single-row tapered roller bearing 1 as shown in FIG. 53 in a half longitudinal sectional view is generally used in order to bear a radial load and an axial load. The tapered roller bearing 1 includes an inner ring 5 having a tapered raceway surface 3 on an outer peripheral side, an outer ring 9 having a tapered raceway surface 7 on an inner peripheral surface arranged so as to surround the inner ring 5, and an inner race 5. And outer ring 9
And a plurality of tapered rollers 11 interposed therebetween, and a retainer (for example, a pressed steel plate retainer) 13 for holding the tapered rollers 11. The inner ring 5 has a small-diameter flange 15 and a large-diameter flange 17 on the small-diameter end side and the large-diameter end side of the raceway surface 3, respectively, in order to lock the rollers in the axial direction.

In the tapered roller bearing 1 described above, the cage 13
The steps shown in FIG. 54 to FIG. That is, a disc-shaped blank 71 is punched out of a steel plate (not shown) in the blanking step of FIG. 54, a cup-shaped work 73 is formed from the blank 71 in the drawing step of FIG. A core hole 75 (reference hole) is formed in the bottom surface of the workpiece 73, and a pocket 27 and a column 25 are formed on the outer periphery of the work 73 in the pocket removing step of FIG. 57, and a bottom hole is formed in the bottom surface of the work 73 in the inner diameter removing step of FIG. 77, a contact surface with the tapered roller 11 is formed inside the column portion 25 in the window pushing step of FIG. 59, and the large-diameter side end of the work 73 is formed to a predetermined size in the turning edge cutting step of FIG. Be trimmed. Thereby, the retainer 13 in which the large-diameter ring portion 23 and the small-diameter ring portion 21 are connected by the many pillar portions 25 is manufactured. In the figure, reference numeral 29 denotes the small diameter ring portion 21.
3 shows a curled portion formed at the end of the.

[0004] In the tapered roller bearing 1 described above,
When assembling the tapered roller 11 and the retainer 13 to the inner ring 5, it is necessary to avoid interference between the tapered roller 11 and the small-diameter side flange 15. For this reason, a method of once forming the retainer 13 into a regular shape and dimensions, and then expanding the small-diameter ring portion 21 side portion of the column portion 25 by a bottom pressing process shown in FIG. 61 to increase the roller inscribed circle diameter D. Has been adopted. In FIG. 61, a member denoted by reference numeral 79 is a bottom-punching punch. This allows
The column portion 25 is temporarily bent into a rectangular shape protruding outward, but after the tapered roller 11 and the retainer 13 are assembled to the inner ring 5, the column portion 25 is restored to a normal shape by a caulking process shown in FIG. . In FIG. 62, a member indicated by reference numeral 81 is a caulking jig.

[0005]

In the conventional tapered roller bearing, the problem that the column portion 25 is plastically deformed twice in the bottom pushing step and the crimping step, thereby deteriorating the bearing performance and durability. Had occurred. As is well known, in the press-type retainer 13, the size and shape of the column portion 25 that slides on the tapered roller 11 are the most important. However, in the above-described conventional manufacturing method, the small-diameter ring portion 21 of the column portion 25 is not used.
Not only a small amount of residual deformation occurs in the side portions, but also the residual deformation often becomes non-uniform between the column portions 25. As a result, it is inevitable that a partial skew occurs between the tapered roller 11 and the column portion 25, and an uneven sliding contact between the tapered roller 11 and each column portion 25 is unavoidable. The smooth rotation of the roller 11 is hindered, and local wear and heat generation of the tapered rollers 11 are generated. In addition, in the conventional manufacturing method, in order to bend and deform the column portion 25 into a rectangular shape, in order to avoid interference with the tapered rollers 11 of the large-diameter ring portion 23 and the small-diameter ring portion 21 during the bottom pushing step, FIG. As shown, the axial length (window length) L of the pocket 27 in which the tapered roller 11 is held has to be made larger than necessary. This makes it difficult to regulate the position of the tapered rollers 11 in the pocket 27, and inevitably reduces the strength of the retainer 13. The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a tapered roller bearing in which the dimensions and shape accuracy of a cage are improved and the performance and durability are improved.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an inner ring having a tapered raceway surface on an outer peripheral side and an outer race having a tapered raceway surface on an inner peripheral surface. And a number of tapered rollers interposed between the inner ring and the outer ring, and a number of pockets provided for holding these tapered rollers, and the tapered rollers are formed between the inner ring and the outer ring. A tapered metal retainer rotatably supported between the inner ring and an outer flange-shaped small-diameter flange formed at the small-diameter end of the inner ring and having an inner surface facing the small-diameter end face of the tapered roller; A large-diameter flange formed in the large-diameter end of the inner ring, and having an inner surface facing the large-diameter end face of the tapered roller, and having an outward flange-shaped large-diameter flange. After fitting the tapered rollers from the inside, the inner ring is held by the metal. By inserting the inner ring or the metal cage and the inner ring in the axial direction with a predetermined pressing force, so that the tapered rollers can ride over the small-diameter side flange, and A tapered roller bearing for assembling a roller to the inner ring is proposed, wherein the metal cage has a substantially linear axial cross section. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into the metal cage, the small-diameter ring portion of the metal cage relatively easily expands its diameter within the elastic limit. Rollers get over small diameter side flange.

According to the second aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and an interposition between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. A roller bearing, wherein the inscribed circle diameter when the tapered roller is pressed outward in the metal cage is Di, and the outer diameter of the small-diameter side flange is Df, 0.002 <( Df-Di) / Df <0.0
The one set to 15 is proposed. In the tapered roller bearing of the present invention, the tapered roller and the metal cage fall out after assembly while suppressing the increase of the press-fit load of the inner ring to the metal cage and the damage of the tapered roller due to the sliding contact with the small diameter side flange. Will be prevented.

According to the third aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and an interposition between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. A roller bearing, wherein the metal cage has a small-diameter-side enlarged portion guided on the raceway surface of the outer ring on the small-diameter side, and a large-diameter side guided on the raceway surface of the outer ring on the large-diameter side. It is proposed that the enlarged diameter portion is formed. In the tapered roller bearing of the present invention, when the inner ring is press-fitted into the metal cage, the large diameter large-diameter side ring part and the large diameter small-diameter side ring part are provided, so that the column part defining the pocket is elastic. It is relatively easily elastically deformed within the limit, and the tapered roller can get over the small diameter side flange with a small pressing force.

According to the invention of claim 4, the inner race has a tapered raceway surface on the outer peripheral side, the outer race has a tapered raceway surface on the inner peripheral surface, and the inner race is interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. The present invention proposes a roller bearing in which the thickness of the metal cage gradually decreases from the large diameter side to the small diameter side. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into the metal cage, the tapered roller can be formed with a small pressing force by relatively easily expanding the small diameter side of the metal cage within the elastic limit. Overcoming the small diameter flange.

[0010] In the invention according to claim 5, the inner race has a tapered raceway surface on the outer peripheral side, the outer race has a tapered raceway surface on the inner peripheral surface, and the intermediate race is interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. The present invention proposes a roller bearing, in which the metal cage has a small-diameter ring portion formed on the small-diameter side formed in a waveform having a concave portion or a convex portion in the same phase as the pocket. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into the metal cage, the small-diameter ring portion of the metal cage relatively easily expands its diameter within the elastic limit. Rollers get over small diameter side flange.

Further, according to the present invention, an inner race having a tapered raceway surface on an outer peripheral side, an outer race having a tapered raceway surface on an inner peripheral surface, and an interposition between the inner race and the outer race are provided. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. The present invention proposes a roller bearing, wherein the metal cage has a substantially linear axial cross section and the width of the pocket is enlarged at least on the small diameter side. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into the metal cage, the tapered rollers are easily inclined outward by entering the enlarged portion of the pocket, and the columnar portion defining the pocket is also formed. By being easily elastically deformed, the tapered roller can get over the small-diameter flange with a small pressing force.

Further, in the invention according to claim 7, the inner race has a tapered raceway surface on the outer peripheral side, the outer race has a tapered raceway surface on the inner peripheral surface, and the intermediate race is interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. The present invention proposes a roller bearing, wherein the metal cage has a small-diameter ring portion formed on a small-diameter side and at least one notch continuous with the pocket. In the tapered roller bearing of the present invention, for example, when press-fitting the inner ring into a metal cage, the diameter of the small-diameter ring portion is relatively easily expanded due to the presence of the notch,
With a small pressing force, the tapered rollers can get over the small diameter side flange.

[0013] According to the invention of claim 8, the inner race has a tapered raceway surface on the outer peripheral side, the outer race has a tapered raceway surface on the inner peripheral surface, and is interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. A roller bearing, wherein the metal cage is axially 1/1/2 of the total length from a small-diameter end.
In the range of 2 or less, it is proposed that the axial section is substantially the same as the pitch cone angle of the tapered roller, and the width of the pocket is substantially the same as the pitch circle radius of the tapered roller. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into the metal cage, the tapered rollers are inclined outward in the above range, so that the tapered rollers can get over the small diameter side flange with a small pressing force. .

Further, according to the ninth aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage,
The inner ring or the metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the cone for assembling the tapered rollers to the inner ring can be obtained. The present invention proposes a roller bearing in which a notch for connecting pockets adjacent to a small-diameter side end portion is formed in the metal cage.
In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into a metal cage, the columnar portion that defines the pocket is elastically deformed outward relatively easily, and the tapered roller is pressed against the small-diameter side with a small pressing force. Overcoming the tsuba.

According to the tenth aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage, The metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the tapered roller bearing that assembles the tapered rollers to the inner ring can be used. In the metal cage, the angle of the axial cross section is larger than the pitch cone angle of the tapered rollers, and the diameter of the pocket near the small-diameter side end is substantially the same as the pitch circle radius of the tapered rollers. Suggest something. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into the metal cage, the tapered rollers are tilted outward on the small diameter side of the metal cage, so that the tapered rollers can be pressed with a small pressing force so that the small diameter side flange. To get over.

Further, according to the eleventh aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage, The metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the tapered roller bearing that assembles the tapered rollers to the inner ring can be used. When the metal cage is deformed into an elliptical shape within the elastic limit, the small-diameter-side flange is attached to allow the passage of the tapered rollers held on the minor-diameter side of the metal cage. It is proposed that a plurality of notches corresponding to the tapered rollers are formed. In the tapered roller bearing of the present invention, the metal cage is elastically deformed into an elliptical shape at the time of assembling, so that the tapered roller on the short diameter side protruding inward passes through the notch of the small diameter side flange.

According to the twelfth aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and an interposition between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. Insert from the large diameter end of the metal cage, The metal cage and the inner ring are brought close to each other in the axial direction with a predetermined pressing force, so that the tapered rollers can get over the small-diameter-side flange, and the tapered roller bearing that assembles the tapered rollers to the inner ring can be used. There is proposed a configuration in which a plurality of notches corresponding to the tapered rollers held by the metal cage are formed in the small-diameter side flange. In the tapered roller bearing of the present invention, for example, when the inner ring is press-fitted into a metal cage, the tapered rollers held by the metal cage pass through the notches, so that the tapered rollers have a small diameter with a very small pressing force. You will get over the side tsuba.

Further, in the invention of claim 13, according to claims 1 to
In a twelfth tapered roller bearing, the present invention proposes a tapered roller bearing in which the outer peripheral surface of the small-diameter side flange has a tapered shape whose diameter decreases toward the outer end side. In the tapered roller bearing according to the present invention, the tapered rollers smoothly pass over the small-diameter flange along the taper.

Further, according to the present invention, the inner race has a tapered raceway surface on the outer peripheral side, the outer race has a tapered raceway surface on the inner peripheral surface, and the intermediate race is interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner surface thereof has a large-diameter-side flange having an outward flange shape facing the large-diameter-side end face of the tapered roller, and the inner ring is inserted after the tapered roller is fitted into a pocket of the metal cage from the inside. By inserting the metal cage from the large-diameter end, A tapered roller bearing for assembling the tapered rollers to the inner ring, wherein the small-diameter side flange is formed with the same number of notches as the number of the cutouts provided for the passage of the tapered rollers held by the metal cage. Suggest something. In the tapered roller bearing of the present invention, for example, when the inner ring is inserted into the metal cage, the tapered rollers held by the metal cage pass through the notch of the small-diameter side flange, so that the metal cage The pressing force and the like required for expanding the diameter become unnecessary.

Further, in the invention according to claim 15, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner flange having an outer flange-shaped large-diameter flange facing the large-diameter end face of the tapered roller, and after inserting the inner ring into the metal cage, a pocket of the metal cage. The tapered roller is fitted into the tapered roller from the outer peripheral side. A tapered roller bearing for assembling to the inner ring, wherein the metal cage has a diameter larger than a pitch circle diameter of the tapered rollers rolled into contact with a raceway ring of the inner ring, and a large-diameter side of the pocket. It is proposed that the end and the small diameter end are enlarged. In the tapered roller bearing of the present invention, after setting the metal cage and the inner ring in a jig or the like, when the tapered rollers are pushed in from the outside of the pocket, the columnar portion defining the pocket is elastically deformed relatively easily, Assembly of the tapered rollers and the inner ring is performed.

Further, according to the sixteenth aspect of the present invention, an inner race having a tapered raceway surface on the outer peripheral side, an outer race having a tapered raceway surface on the inner peripheral surface, and interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner race, and an inner surface formed at an outer flange-shaped small-diameter flange facing the small-diameter end of the tapered roller; and a large-diameter end of the inner race. An inner flange having an outer flange-shaped large-diameter flange facing the large-diameter end face of the tapered roller, and after inserting the inner ring into the metal cage, a pocket of the metal cage. The tapered roller is fitted into the tapered roller from the outer peripheral side. A tapered roller bearing for performing assembly to the inner ring, proposes that protrudes on the outer circumferential side of the axial center portion of the metal retainer. In the tapered roller bearing of the present invention, when the tapered roller is pushed in from the outside of the pocket after the metal cage and the inner ring are set in a jig or the like, the columnar portion defining the pocket is relatively easily elastically deformed, and the tapered roller is deformed. Assembly of the roller and the inner ring is performed.

According to the seventeenth aspect of the present invention, the inner race has a tapered raceway surface on the outer peripheral side, the outer race has a tapered raceway surface on the inner peripheral surface, and the intermediate race is interposed between the inner race and the outer race. A plurality of tapered rollers and a plurality of pockets provided for holding these tapered rollers, and a tapered metal member that supports the tapered rollers so as to roll freely between the inner ring and the outer ring. A retainer, formed at a small-diameter end of the inner ring, an inner surface of which is formed at an outer flange-shaped small-diameter flange facing the small-diameter end face of the tapered roller, and formed at a small-diameter end of the inner race; For a tapered roller bearing whose inner surface has an outer flange-shaped small diameter side flange facing the small diameter side end face of the tapered roller, after fitting the tapered roller into the pocket of the metal cage from the inside, Insert the inner ring from the large-diameter end of the metal cage. The inner ring or the metal cage and the inner ring are caused to approach each other in the axial direction, thereby causing the tapered rollers to ride over the small-diameter side flange and assembling the tapered rollers to the inner ring. A method for assembling a roller bearing, comprising: before inserting an inner ring from a large-diameter end portion of a metal cage, inserting a diameter expanding means into the metal cage and holding the metal ring in the metal cage. The small-diameter end of the tapered roller is pressed outward, and then the tapered roller protruding from the metal cage is pressed against the large-diameter end surface of the pocket by pressing means, and the large-diameter end of the metal cage is pressed. It is proposed that the part is locked by locking means. In the assembling method of the present invention, the tapered rollers are pressed outward and pressed against the large-diameter end surface of the pocket, so that the inscribed circle diameter is increased, and the tapered rollers can pass over the small-diameter flange with a very small pressing force. Become.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the tapered roller bearing according to the first embodiment in a half cut longitudinal sectional view, and FIG. 2 shows the cage of the same embodiment in a plan view. In the first embodiment,
The invention of claims 1 and 13 and 17 is embodied. As shown in FIG. 1, the tapered roller bearing 1 of the first embodiment includes an inner ring 5 having a tapered raceway surface 3 on an outer peripheral side,
An outer ring 9 which is arranged so as to surround the inner ring 5 and has a tapered raceway surface 7 on the inner peripheral side; a plurality of tapered rollers 11 interposed between the inner ring 5 and the outer ring 9; And a retainer 13 made of a steel plate for retaining 11. The inner ring 5 has an outward flange-shaped small-diameter side flange 15 whose inner surface faces the small-diameter side end face of the tapered roller 11 on the small-diameter end side so as to lock the tapered roller 11 in the axial direction. Also, the inner side surface has an outward flange-shaped large-diameter flange 17 facing the large-diameter end surface of the tapered roller 11. In the case of the present embodiment, the outer peripheral surface of the small diameter side flange 15 is formed in a tapered shape having a small diameter toward the outer end side. The outer diameter Df of the small diameter side flange 15 is set to be larger by a predetermined amount than the inscribed circle diameter Di of the tapered rollers 11 in order to prevent the tapered rollers 11 and the retainer 13 from falling off.

The retainer 13 is made of a steel plate by the same press molding method as that of the conventional apparatus. As shown in FIG. 2, the small-diameter ring portion 21 and the large-diameter ring portion 23 have a large number of columns. It is connected by the part 25. In FIG.
Is a pocket into which the tapered roller 11 fits, and is defined by both the ring portions 21 and 23 and the column portion 25. Also,
The retainer 13 does not have a curl portion at the end of the small-diameter ring portion 21 unlike the conventional device, and has a simple linear cross section in the axial direction as shown in FIG.

In the present embodiment, the following procedure is employed for assembling the tapered roller 11 and the retainer 13 to the inner ring 5. First, the assembler operates the retainer 13.
After the tapered rollers 11 are fitted into the respective pockets 27 from the inside, as shown in FIG.
And press the small-diameter end of each tapered roller 11 outward.
At this time, the retainer 13 is relatively easily elastically deformed because the small-diameter ring portion 21 has no curled portion, and the small-diameter ring portion 21 and the column portion 25 are pressed by the tapered rollers 11 to expand the diameter. I do.

Next, as shown in FIG. 4, the assembling worker presses the small-diameter end protruding from the holder 13 into the pressing jig 33.
To press the tapered roller 11 against the large-diameter side end surface of the pocket 27 (the inner end surface of the large-diameter ring portion 23),
The large-diameter end of the retainer 13 is locked by a locking jig 35. Accordingly, the tapered roller 11 moves outward due to the deformation (expansion of the diameter) of the small-diameter ring portion 21 and the column portion 25, and at the same time, the large-diameter inner surface of the pocket 27 (the large-diameter ring portion 23).
(The inner end surface of the inner surface).

Thereafter, as shown in FIG. 5, the assembler places the inner ring 5 on the tip of the diameter-expanding jig 31 and then moves the inner ring 5 into the tapered roller 11 by using a hydraulic device or the like. The inner ring 5 and the diameter increasing jig 31 are moved downward in FIG. Then, as shown in FIG. 6, the small-diameter end of the tapered roller 11 once abuts on the small-diameter flange 15 of the inner ring 5. Together with the fact that the side flange 15 is formed in a tapered shape having a small diameter toward the outer end side, the tapered rollers 11 relatively easily pass over the small diameter side flange 15 and fit into the raceway surface 3 of the inner race 5. I do. At this time, as the tapered roller 11 moves outward, the small-diameter ring portion 21 and the column portion 25 of the retainer 13 slightly increase in diameter, but both members have already been expanded by the diameter-expanding jig 31. Therefore, the pressing force (assembly load) required for the hydraulic device or the like can be relatively small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. In addition, tapered roller 1
When the jigs 31, 33, 35 are removed by the assembling worker after the fitting 1 has been inserted into the raceway surface 3 of the inner race 5, the retainer 13 elastically returns to its original shape as shown in FIG. The rollers 11 are securely held.

FIG. 8 shows a case where the tapered roller 11 and the retainer 13 are assembled to the inner ring 5 without using the diameter increasing jig 31 and the pressing jig 33 in the tapered roller bearing 1 of the first embodiment. Is shown. In this case, the lap amount between the tapered roller 11 and the small-diameter side flange 15 becomes relatively large. However, since the tapered roller 11 is guided by the taper of the small-diameter side flange 15 and moves outward, the assembly load of the hydraulic device or the like is reduced. By increasing the diameter by a predetermined amount, the diameter of the small-diameter ring portion 21 and the column portion 25 of the retainer 13 is increased in the same manner as in the above-described example, and the tapered roller 1
1 and the retainer 13 are assembled.

FIG. 9 shows the tapered roller bearing according to the second embodiment in an exploded half cut longitudinal sectional view in a state where the outer ring is removed. The second embodiment embodies the invention of claim 2. As shown in FIG. 9, the tapered roller bearing 1 of the second embodiment has a configuration substantially similar to that of the first embodiment, but the small diameter ring portion 21 is provided with the same curl portion 29 as the conventional device. Have been. Further, in the present embodiment, when the inscribed circle diameter when the tapered roller 11 is pressed outward in the retainer 13 is Di, and when the outer diameter of the small diameter side flange 15 is Df, the inscribed circle diameter Di is equal to Di. The relationship with the outer diameter Df of the small diameter side flange 15 is set so as to satisfy 0.002 <(Df−Di) / Df <0.015.

The present inventors have determined that the inscribed circle diameter D of the tapered roller 11
i and the outer diameter Df of the small diameter side flange 15 are variously changed,
The tapered roller 11 and the retainer 13 were assembled by press fitting. As a result, as shown in FIG. 10, a value ((Df-Di) / Df) obtained by dividing the difference between the inscribed circle diameter Di and the outer diameter Df of the small diameter side flange 15 by the inscribed circle diameter Di increases. (Df-Di)
/Df≦0.002, the inner ring 5
In some cases, the tapered rollers 11 and the retainer 13 fall off from the shaft. In the range of (Df−Di) /Df≧0.015, it was found that the indentation formed on the small diameter end side of the tapered roller 11 due to the pressure contact with the small diameter side flange 15 had a depth of 5 μm or more. In the present embodiment, the inscribed circle diameter is Di and the outer diameter Df of the small diameter side flange 15 is 0.002 <(Df−Di) / Df.
By setting the value in the range of <0.015, while preventing these problems, the inner ring 5 can be mounted with a relatively small assembly load.
The tapered roller 11 and the retainer 13 could be assembled. In the second embodiment, the outer peripheral surface of the small-diameter ring portion 21 is cylindrical, but may be tapered, as in the first embodiment.

FIG. 11 shows a tapered roller bearing according to the third embodiment in a half vertical section, and FIG. 12 shows a partially modified example of the third embodiment in a half vertical section. The third embodiment embodies the invention of claim 3. As shown in FIGS. 11 and 12, the tapered roller bearing 1 of the third embodiment has a configuration substantially similar to that of the first embodiment, but the shape of the retainer 13 is different. That is,
The cage 13 of the present embodiment has a raceway surface 7 of the outer race 9 on the small diameter side.
A small-diameter-side enlarged portion 41 having a substantially Z-shaped cross-section is formed from the column portion 25 to the small-diameter ring portion 21, and is also guided to the raceway surface 7 of the outer ring 9 on the large-diameter side. The large-diameter side enlarged diameter portion 43 is formed from the column portion 25 to the large-diameter ring portion 23.

In the third embodiment, the tapered roller 11 and the retainer 13
When assembling by press-fitting, the pillar 25
Are easily elastically deformed, the assembling load required for the hydraulic device or the like is relatively small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. FIG. 13 shows the relationship between the diameter expansion amount of the tapered roller 11 and the assembling load. In the present embodiment shown by a solid line, the cage 13 does not have a diameter expansion portion and is shown by a one-dot chain line. In comparison, it can be seen that the assembling load at the same diameter expansion amount is significantly reduced. Further, in the present embodiment, it is not necessary to partially narrow the column 25, and in the modified example, since the column 25 supports the entire length of the tapered roller 11, the tapered roller 11 can be stably held. . In the present embodiment, it is desirable to use a thin steel plate as the material of the retainer 13 so that the elastic deformation of the column portion 25 is easily performed. In this case, the cage 1
3, the retainer 13 may be bent and deformed by the centrifugal force during operation.
In addition, since the large-diameter-side enlarged-diameter portion 43 is guided on the raceway surface 7 of the outer race 9, the amount of flexural deformation can be kept very small.

FIG. 14 shows the tapered roller bearing according to the fourth embodiment in a half cut longitudinal sectional view without the outer ring.
FIG. 5 shows a partially modified example of the fourth embodiment. The fourth embodiment embodies the invention of claim 4. As shown in FIGS. 14 and 15, the tapered roller bearing 1 of the fourth embodiment has substantially the same configuration as that of the first embodiment, but the shape of the retainer 13 is different. That is,
In the configuration shown in FIG. 14, the thickness of the retainer 13 gradually decreases from the large-diameter side to the small-diameter side, and a curl portion 29 is formed at an end of the small-diameter ring portion 21. FIG.
Although the plate thickness of the retainer 13 is gradually reduced from the large diameter side to the small diameter side also in the configuration shown in FIG. 1, the axial cross section of the retainer 13 is a simple straight line like the first embodiment. I have.

In the fourth embodiment, the tapered roller 11 and the retainer 13
When assembling by the press-fitting method, the small-diameter side portion of the retainer 13 is easily elastically deformed, and the assembling load required for the hydraulic device and the like can be relatively small. Little damage occurs. FIG. 16 shows the relationship between the diameter expansion amount of the tapered roller 11 and the assembling load. In the present embodiment shown by a solid line, the retainer 13 is shown by a dashed line formed with a uniform thickness. It can be seen that the assembling load at the same diameter expansion amount is significantly smaller than that of the above.
Further, in the present embodiment, it is not necessary to partially narrow the column 25, and in the modified example, since the column 25 supports the entire length of the tapered roller 11, the tapered roller 11 can be stably held. .

FIG. 17 shows the tapered roller bearing according to the fifth embodiment in a half longitudinal sectional view, FIG. 18 shows the cage of the same embodiment in a perspective view, and FIG. 19 shows an enlarged view of a portion A in FIG. The figure is shown. The fifth embodiment embodies the invention of claim 5. The tapered roller bearing 1 according to the fifth embodiment has a configuration substantially similar to that of the first embodiment,
The shape of the retainer 13 is different. That is, FIG.
As shown in FIG. 18, the retainer 13 is
1 is formed in a waveform having a concave portion 45 having the same phase as that of the pocket 27.

In the fifth embodiment, the tapered roller 11 and the retainer 13
When assembling is performed by the press-fitting method, the small-diameter ring portion 21 of the retainer 13 is easily elastically deformed, and the assembling load required for the hydraulic device or the like is relatively small. Almost no damage occurs. FIG. 20 shows the relationship between the diameter expansion amount of the tapered roller 11 and the assembling load. In the present embodiment shown by a solid line, the small-diameter ring portion is shown by a single-dot chain line having a simple circular cross section. In comparison, it can be seen that the assembling load at the same diameter expansion amount is significantly reduced. Further, in the present embodiment, it is not necessary to partially narrow the column 25, and in the modified example, since the column 25 supports the entire length of the tapered roller 11, the tapered roller 11 can be stably held. . FIG. 21 shows a main part of a partially modified example of the fifth embodiment. In this modified example, the small-diameter ring portion 21 has a waveform having a convex portion 47 in the same phase as the pocket 27. The operation at the time of assembly is the same as that of the fifth embodiment.

FIG. 22 shows the tapered roller bearing according to the sixth embodiment in a half cut longitudinal sectional view, and FIG. 23 shows the cage of the same embodiment in a plan view. The sixth embodiment embodies the invention of claim 6. The tapered roller bearing 1 of the sixth embodiment has substantially the same configuration as that of the first embodiment, but differs in the shape of the pocket 27 of the retainer 13. That is, as shown in FIG. 23, the retainer 13 of the present embodiment is different from the retainer 13 of the first embodiment (simple taper shape) shown by the two-dot chain line in that the widened portion 51 is provided on the small diameter side of the pocket 27. Is formed.

In the sixth embodiment, by adopting such a configuration, the inner ring 5 is provided with the tapered rollers 11 and the retainers 13.
24, the tapered roller 11 is inclined at the widened portion 51 of the pocket 27, as shown in FIG. Thereby, similarly to the first embodiment, the small-diameter ring portion 21 of the retainer 13 is easily elastically deformed.
The assembling load required for the hydraulic device or the like can be relatively small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. FIG. 25 shows the relationship between the diameter expansion amount of the tapered roller 11 and the assembling load. In the present embodiment shown by the solid line, the first embodiment in which the axial section of the retainer 13 is merely linear is shown. In addition to the form (indicated by a dashed line), when a device similar to a conventional device having a curl portion is used (indicated by a dashed line)
It can be seen that the assembling load at the same diameter expansion amount is significantly smaller than when only the widened portion 51 is formed in the pocket 27 while leaving the curl portion (indicated by a two-dot chain line).

FIGS. 26 and 27 show the main part of a retainer 13 according to a partially modified example of the sixth embodiment. That is, FIG. 26 shows a rectangular widened portion 51, and FIG. 27 shows widened portions 51 and 53 formed on the small diameter side and the large diameter side of the pocket 27, respectively. The operation of the modified example is the same as that of the sixth embodiment.

FIG. 28 shows the tapered roller bearing according to the seventh embodiment in a half longitudinal sectional view, FIG. 29 shows the cage of the embodiment in a perspective view, and FIG. 30 shows the cage in a plan view. Is shown. The seventh embodiment embodies the invention of claim 7. The tapered roller bearing 1 of the seventh embodiment has a configuration substantially similar to that of the first embodiment,
The shape of the retainer 13 is different. That is, as shown in FIGS. 29 and 30, the retainer 13 of the present embodiment has two notches 5 connected to the pocket 27 in the small-diameter ring portion 21.
5 are formed.

In the seventh embodiment, the tapered roller 11 and the retainer 13
When assembling is performed by the press-fitting method, the small-diameter ring portion 21 and the column portion 25 are pressed by the tapered rollers 11 so that the diameter is more easily increased than in the first embodiment, and the assembling load required for the hydraulic device or the like is relatively small. Besides reducing the size, the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. Although FIG. 31 shows a main part of a partially modified example of the seventh embodiment,
The small-diameter ring portion 21 of this modified example is formed with a notch 55 that is continuous with each pocket 27, so that the small-diameter ring portion 21 is more easily expanded than the retainer 13 of the seventh embodiment. .

FIG. 32 shows a tapered roller bearing according to the eighth embodiment in a half cut longitudinal sectional view in a state where an outer ring is removed. The eighth embodiment embodies the invention of claim 8. The tapered roller bearing 1 of the eighth embodiment has substantially the same configuration as that of the first embodiment, but the shape of the retainer 13 is different. That is, the retainer 13 of the present embodiment
The axial cross section is the same as the pitch cone angle of the tapered roller 11 and the width of the pocket 27 is the same as the pitch circle radius of the tapered roller 11 in a range of １ ／ of the entire length in the axial direction from the small diameter side end. Is formed.

In the eighth embodiment, by adopting such a configuration, the inner ring 5 is provided with the tapered rollers 11 and the retainers 13.
When assembling by the press-fitting method, as shown in FIG.
7 inclines in the first half. As a result, the diameter of the roller inscribed circle is temporarily increased, the assembly load required for the hydraulic device or the like can be relatively small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. FIG. 34 shows a partially modified example of the eighth embodiment. A curled portion 29 is formed in the small-diameter ring portion 21 of this modified example, and the rigidity of the small-diameter ring portion 21 is reduced to the eighth. It is higher than that of the embodiment.

FIG. 35 shows the tapered roller bearing according to the ninth embodiment in a half cut longitudinal sectional view without the outer ring.
6 shows the cage in plan view. The ninth embodiment is an embodiment of the ninth invention. The tapered roller bearing 1 of the ninth embodiment has substantially the same configuration as that of the first embodiment, but the shape of the retainer 13 is different. That is, in the cage 13 of the present embodiment, as shown in FIG.
A notch 59 is formed to connect the seven pieces.

In the ninth embodiment, the tapered roller 11 and the retainer 13
When assembling by using the press-fitting method,
The diameter of the tapered roller 11 is easily increased by being pressed by the pressure roller 1, and the assembling load required for the hydraulic device or the like can be relatively small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. still,
FIG. 37 shows a cage 1 according to a partially modified example of the ninth embodiment.
3, but in this modification, all the pockets 27
Since the small-diameter side end portions are continuous, the small-diameter ring portion 21 is not substantially present, and the diameter of the column portion 25 is further increased as compared with the retainer 13 of the ninth embodiment.

FIG. 38 shows a tapered roller bearing according to the tenth embodiment in a half cut longitudinal sectional view without an outer ring. The tenth embodiment embodies the invention of claim 10. The tapered roller bearing 1 of the tenth embodiment includes:
The configuration is substantially the same as that of the first embodiment.
3 is different. That is, in the cage 13 of the present embodiment, the angle P1 of the axial section is larger than the pitch cone angle P2 of the tapered rollers, and the diameter in the vicinity of the small diameter side end of the pocket 27 is the same as the pitch circle radius of the tapered rollers. Has become.

In the tenth embodiment, by adopting such a configuration, the tapered rollers 11 and the cage 1
When assembling 3 by the press-fitting method, the tapered rollers 11 are inclined at the front half of the pocket 27 as shown in FIG.
As a result, the diameter of the roller inscribed circle is temporarily increased, the assembly load required for the hydraulic device or the like can be relatively small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15.

FIG. 40 is a perspective view of the inner ring 5 of the tapered roller bearing according to the eleventh embodiment. The eleventh embodiment embodies the invention of claim 11. The inner ring 5 of the eleventh embodiment has substantially the same shape as that of the first embodiment.
When the tapered roller 11 held on the short diameter side of the retainer 13 is located when the roller is deformed into an elliptical shape (exaggerated in FIG. 40) within the elastic limit, three cuts each are provided. Chip 6
1, 63 are formed.

In the eleventh embodiment, the tapered roller 11 and the cage 1
When the retainer 13 is deformed into an elliptical shape by a jig or the like when assembling the tapered roller 3, the tapered rollers 11 can pass through the notches 61 and 63 as shown in FIG. 41. Thus, the assembling load required for the hydraulic device and the like can be extremely small, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15.

FIG. 42 is a perspective view of the inner ring 5 of the tapered roller bearing according to the twelfth embodiment. The twelfth embodiment embodies the invention of claim 12. The inner race 5 of the twelfth embodiment has substantially the same shape as that of the first embodiment.
Plural at the same pitch as above (in the example shown, half of tapered rollers 11)
Notch 65 is formed.

In the twelfth embodiment, by adopting such a configuration, the tapered rollers 11 and the cage 1
When assembling 3 by the press-fitting method, as shown in FIG. 43, half of the tapered rollers 11 pass through the small-diameter ring portion 21 with almost no resistance. As a result, the assembling load required for the hydraulic device and the like can be made relatively small,
The diameter of the roller 1 is increased, and the tapered roller 11 is hardly damaged by the contact with the small-diameter side flange 15. In the twelfth embodiment, the notches 65 are formed by half of the tapered rollers 11, but the notches 65 may be provided for all the tapered rollers 11. Can be even smaller.

FIG. 44 shows the tapered roller bearing according to the thirteenth embodiment in a half longitudinal sectional view, and FIG. 45 shows the inner ring 5 of the same embodiment in a perspective view. The thirteenth embodiment embodies the invention of claim 14. 14th
The inner ring 5 of the embodiment has substantially the same shape as that of the first embodiment, but the small-diameter ring portion 21 has a notch 67 provided for the passage of each tapered roller 11 held by the retainer 13. The same number of tapered rollers 11 (only six locations are shown in FIG. 45) and the same pitch are formed.

In the thirteenth embodiment, the tapered roller 11 and the cage 1
When assembling the tapered roller 3, the tapered roller 11 has a notch 67.
From the small-diameter ring portion 21 without resistance. Thereby, the assembling load required for the hydraulic device or the like can be reduced to a very small value, and the small-diameter ring portion 21 does not increase in diameter.
The tapered roller 11 is not damaged at all by the contact with the roller 5.
Note that FIG. 46 shows a partially modified example of the thirteenth embodiment in a half cut vertical sectional view. In this modified example, a steel ring 69 is provided inside the small-diameter ring portion 21 of the inner race 5 with respect to the above configuration. To completely prevent the tapered rollers 11 and the retainer 13 from falling off from the inner ring 5.

FIG. 47 shows the tapered roller bearing according to the fourteenth embodiment in a half cut longitudinal sectional view without the outer ring, and FIG. 48 shows the cage 13 of the same embodiment in a plan view. The fourteenth embodiment embodies the invention of claim 15. The retainer 13 of the fourteenth embodiment has substantially the same shape as that of the first embodiment,
7, widened portions 51 and 53 are formed on the small diameter side and the large diameter side, respectively.

In the fourteenth embodiment, by adopting such a configuration, when assembling the tapered roller 11 and the retainer 13 to the inner ring 5, the retainer 1 is attached to the outer periphery of the inner ring 5.
After the position 3, the tapered roller 11 is fitted into the pocket 27 of the retainer from the outer peripheral side as shown in FIG. At this time, since the widened portions 51 and 53 are formed in the pocket 27, the column portion 25 is relatively easily elastically deformed, and the assembling load required for fitting the tapered rollers 11 is extremely small.
The tapered roller 11 is not damaged at all by the contact with the small diameter side flange 15.

FIG. 50 shows the tapered roller bearing according to the fifteenth embodiment in a half cut longitudinal sectional view without the outer ring, and FIG. 51 shows the cage 13 of the same embodiment in a perspective view. The fifteenth embodiment embodies the invention of claim 16. The retainer 13 of the fourteenth embodiment includes a first
Unlike the embodiment, the central portion in the axial direction (the column portion 25) is projected outward.

In the fifteenth embodiment, by adopting such a configuration, when assembling the tapered roller 11 and the retainer 13 to the inner race 5, the retainer 1 is mounted on the outer periphery of the inner race 5.
After the position 3, the tapered roller 11 is fitted into the pocket 27 of the retainer from the outer peripheral side as shown in FIG. At this time, the pillar portion 25 protruding to the outer peripheral side is relatively easily elastically deformed, so that the assembling load required for fitting the tapered roller 11 is extremely small, and the tapered roller 1 is brought into contact with the small diameter side flange 15.
No damage occurs at all.

The description of the specific embodiment has been completed.
Aspects of the present invention are not limited to this embodiment.
For example, in the above embodiment, the present invention is applied to a single-row tapered roller bearing provided for supporting a spindle of a machine tool or the like.However, a double-row tapered roller bearing used for an axle bearing device of a railway vehicle, The present invention may be applied to a four-row tapered roller bearing or the like. Further, the assembly method adopted in the first embodiment
To the twelfth embodiment. In addition, the third to
In the twelfth embodiment, the outer peripheral surface of the small diameter ring portion is cylindrical, but may be tapered so that the diameter decreases toward the outer end side. Further, the specific shape and the like of the members constituting each of the above-described embodiments can be appropriately changed according to design convenience or the like.

[0059]

As is apparent from the above description, according to the tapered roller bearing according to the present invention, since no plastic working such as bottom pushing or caulking is performed on the formed cage, the diameter of the column portion is small. Partial skew and uneven sliding contact between the tapered rollers and each column are not generated due to residual deformation generated at the ring portion side portion, and the performance and durability of the tapered roller bearing are improved. In addition, since there is no need to perform bottom pressing that causes interference with the tapered rollers of the large-diameter ring portion and the small-diameter ring portion, it is not necessary to increase the axial length of the pocket more than necessary. In addition, the strength of the retainer was able to be increased while the position of the holder could be regulated reliably. Further, according to the tapered roller bearing assembling method according to the present invention, the radius of the inscribed circle of the tapered roller is previously increased when the tapered roller is assembled to the inner ring, so that the assembling load can be reduced.

[Brief description of the drawings]

FIG. 1 is a half longitudinal sectional view showing a first embodiment of a tapered roller bearing according to the present invention.

FIG. 2 is a plan view showing the cage according to the first embodiment.

FIG. 3 is an explanatory diagram showing a procedure for assembling a tapered roller and a retainer to an inner ring.

FIG. 4 is an explanatory view showing a procedure for assembling the tapered rollers and the retainer to the inner ring.

FIG. 5 is an explanatory view showing a procedure for assembling the tapered rollers and the retainer to the inner ring.

FIG. 6 is an explanatory diagram showing a procedure for assembling the tapered rollers and the retainer to the inner ring.

FIG. 7 is an explanatory diagram showing a procedure for assembling the tapered rollers and the retainer to the inner ring.

FIG. 8 is an explanatory diagram showing a procedure for assembling the tapered rollers and the retainer to the inner ring.

FIG. 9 is an exploded half cut longitudinal sectional view showing a tapered roller bearing according to a second embodiment of the present invention.

FIG. 10 is a diagram showing an inscribed circle diameter of a tapered roller and an outer diameter of a small diameter side flange in a third embodiment.

FIG. 11 is a half longitudinal sectional view showing a tapered roller bearing according to a third embodiment of the present invention.

FIG. 12 is a half vertical sectional view showing a partially modified example of the third embodiment.

FIG. 13 is a graph showing the relationship between the tapered roller diameter expansion amount and the assembling load in the third embodiment.

FIG. 14 is a half cut longitudinal sectional view showing a tapered roller bearing according to a fourth embodiment of the present invention.

FIG. 15 is a half vertical sectional view showing a partially modified example of the fourth embodiment.

FIG. 16 is a graph showing the relationship between the tapered roller diameter expansion amount and the assembly load in the fourth embodiment.

FIG. 17 is a half longitudinal sectional view showing a fifth embodiment of the tapered roller bearing according to the present invention.

FIG. 18 is a perspective view showing a retainer according to a fifth embodiment.

FIG. 19 is an enlarged view of a portion A in FIG. 18;

FIG. 20 is a graph showing a relationship between an amount of diameter expansion of a tapered roller and an assembling load in a fifth embodiment.

FIG. 21 is an enlarged perspective view of a main part showing a partially modified example of the fifth embodiment.

FIG. 22 is a half longitudinal sectional view showing a tapered roller bearing according to a sixth embodiment of the present invention.

FIG. 23 is a plan view showing a retainer according to a sixth embodiment.

FIG. 24 is an explanatory diagram showing the operation of the sixth embodiment.

FIG. 25 is a graph showing the relationship between the diameter expansion amount of a tapered roller and an assembling load in a sixth embodiment.

FIG. 26 is a plan view showing a retainer according to a partially modified example of the sixth embodiment.

FIG. 27 is a plan view showing a retainer according to a partially modified example of the sixth embodiment.

FIG. 28 is a half cut longitudinal sectional view showing a tapered roller bearing according to a seventh embodiment of the present invention.

FIG. 29 is a perspective view showing a retainer according to a seventh embodiment.

FIG. 30 is a plan view showing a retainer according to a seventh embodiment.

FIG. 31 is a plan view showing a retainer according to a partially modified example of the seventh embodiment.

FIG. 32 is a half cut longitudinal sectional view showing an eighth embodiment of the tapered roller bearing according to the present invention.

FIG. 33 is an explanatory diagram showing the operation of the eighth embodiment.

FIG. 34 is a half vertical sectional view showing a partially modified example of the eighth embodiment.

FIG. 35 is a half cut longitudinal sectional view showing a ninth embodiment of a tapered roller bearing according to the present invention.

FIG. 36 is a plan view showing a cage according to a ninth embodiment.

FIG. 37 is a plan view showing a retainer according to a partially modified example of the ninth embodiment.

FIG. 38 is a half vertical sectional view showing a tapered roller bearing according to a tenth embodiment of the present invention.

FIG. 39 is an explanatory diagram showing the operation of the tenth embodiment.

FIG. 40 is a perspective view showing an inner race of an eleventh embodiment of the tapered roller bearing according to the present invention.

FIG. 41 is an explanatory diagram showing the operation of the eleventh embodiment.

FIG. 42 is a perspective view showing an inner race of a twelfth embodiment of the tapered roller bearing according to the present invention.

FIG. 43 is an explanatory view showing the operation of the eleventh embodiment.

FIG. 44 is a half longitudinal sectional view showing a thirteenth embodiment of the tapered roller bearing according to the present invention.

FIG. 45 is a perspective view showing the inner race of the thirteenth embodiment.

FIG. 46 is a half vertical sectional view showing a partially modified example of the thirteenth embodiment.

FIG. 47 is a half longitudinal sectional view showing a tapered roller bearing according to a fourteenth embodiment of the present invention.

FIG. 48 is a plan view showing a cage according to a fourteenth embodiment.

FIG. 49 is an explanatory diagram showing the operation of the fourteenth embodiment.

FIG. 50 is a half longitudinal sectional view showing a fifteenth embodiment of the tapered roller bearing according to the present invention.

FIG. 51 is a perspective view showing a cage according to a fifteenth embodiment.

FIG. 52 is an explanatory diagram showing the operation of the fifteenth embodiment.

FIG. 53 is a half longitudinal sectional view showing a conventional tapered roller bearing.

FIG. 54 is an explanatory diagram showing a manufacturing process of a general cage.

FIG. 55 is an explanatory diagram showing a manufacturing process of a general cage.

FIG. 56 is an explanatory view showing a manufacturing process of a general cage.

FIG. 57 is an explanatory diagram showing a manufacturing process of a general cage.

FIG. 58 is an explanatory diagram showing a manufacturing process of a general cage.

FIG. 59 is an explanatory view showing a manufacturing process of a general cage.

FIG. 60 is an explanatory diagram showing a manufacturing process of a general cage.

FIG. 61 is an explanatory view showing a bottom pushing step of the retainer in the conventional apparatus.

FIG. 62 is an explanatory view showing a caulking step of the retainer in the conventional apparatus.

FIG. 63 is an explanatory view showing deformation of a pillar portion due to a bottom pushing step.

[Explanation of symbols]

 1 ‥‥ tapered roller bearing 3 ‥‥ raceway surface 5 ‥‥ inner ring 7 ‥‥ raceway surface 9 ‥‥ outer ring 11 ‥‥ tapered roller 13 ‥‥ cage 15 ‥‥ small diameter side flange 17 ‥‥ large diameter side flange 21 ‥‥ Small-diameter ring 23 ‥‥ Large-diameter ring 25 ‥‥ Column 27 ‥‥ Pocket 29 ‥‥ Curl 31 ‥‥ Large-diameter jig 33 ‥‥ Pressing jig 35 ‥‥ Locking jig 41 ‥‥ Small-diameter side expansion Diameter part 43 ‥‥ Large diameter side enlarged diameter part 45 ‥‥ Recessed part 47 ‥‥ Convex part 51, 53 ‥‥ Widened part 55, 59, 61, 63, 65, 67 ‥‥ Notch 69 ‥‥ Steel ring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Ozaki 1-5-150 Kugenuma Shinmei, Fujisawa-shi, Kanagawa Nippon Seiko Co., Ltd. No. N-Seiko Co., Ltd. F-term (reference) 3J017 HA02 3J101 AA16 AA25 AA32 AA42 AA54 AA62 BA34 BA50 BA53 BA57 BA63 DA09 EA01 FA46 FA60 GA01 GA31

Claims (17)

[Claims] An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. Is a tapered roller bearing having a substantially linear axial cross section. 2. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. The diameter of the inscribed circle when the tapered roller is pressed outward in Di is Di, and the outer diameter of the small diameter side flange is Df
Wherein: 0.002 <(Df-Di) / Df <0.015 is set. 3. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. Is characterized in that a small-diameter-side enlarged portion guided on the raceway surface of the outer ring is formed on the small-diameter side, and a large-diameter-side enlarged portion guided on the raceway surface of the outer ring is formed on the large-diameter side. Roller bearing. 4. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. Characterized in that the thickness of the tapered roller gradually decreases from the large diameter side to the small diameter side. 5. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter side end, the inner surface of which faces the small-diameter side end surface of the tapered roller, and a large-diameter side end of the inner ring, the inner surface of which is formed in the conical shape. An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. The tapered roller bearing according to claim 1, wherein a cross section perpendicular to the axis of the small diameter ring portion formed on the small diameter side is formed in a waveform having a concave portion or a convex portion in phase with the pocket. 6. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. A tapered roller bearing having a substantially linear axial cross section, wherein the width of the pocket is enlarged at least on the small diameter side. 7. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. The tapered roller bearing according to claim 1, wherein at least one notch continuous with said pocket is formed in a small-diameter ring portion formed on a small-diameter side. 8. An inner ring having a tapered raceway surface on the outer peripheral side, an outer ring having a tapered raceway surface on the inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. Is the full length in the axial direction from the small diameter end.
/ 2 or less, the axial section is substantially the same as the pitch cone angle of the tapered roller, and the width of the pocket is substantially the same as the pitch circle radius of the tapered roller. . 9. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter side end, the inner surface of which faces the small-diameter side end surface of the tapered roller, and a large-diameter side end of the inner ring, the inner surface of which is formed in the conical shape. An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert the inner ring or the metal cage and the inner And a predetermined pressing force in the axial direction to allow the tapered rollers to ride over the small-diameter side flange to assemble the tapered rollers to the inner ring. A tapered roller bearing formed with a notch for connecting pockets adjacent to the small-diameter side end. 10. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert from the radial end and insert the inner ring or the metal cage A tapered roller bearing for assembling the tapered roller to the inner ring by causing the wheel to approach the small diameter side flange by approaching the wheel in the axial direction with a predetermined pressing force; The cone is characterized in that the angle of the cross section in the axial direction is larger than the pitch cone angle of the tapered roller, and the diameter of the pocket near the small-diameter side end is substantially the same as the pitch circle radius of the tapered roller. Roller bearing. 11. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter side end, the inner surface of which faces the small-diameter side end surface of the tapered roller, and a large-diameter side end of the inner ring, the inner surface of which is formed in the conical shape. An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert from the radial end and insert the inner ring or the metal cage A tapered roller bearing for assembling the tapered roller to the inner ring by causing the wheel to approach the small diameter side flange by approaching the wheel in the axial direction with a predetermined pressing force; In order to allow the passage of the tapered rollers held on the short diameter side of the metal cage when the container is deformed into an elliptical shape within the elastic limit, a plurality of the small diameter side flanges corresponding to the tapered rollers are allowed to pass. A tapered roller bearing having a notch formed therein. 12. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner race and the outer race. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. Insert from the radial end and insert the inner ring or the metal cage A tapered roller bearing for assembling the tapered rollers to the inner ring by causing the tapered rollers to move over the small-diameter side flange by approaching the ring with a predetermined pressing force in the axial direction; A plurality of notches corresponding to the tapered rollers held by the metal cage. 13. The tapered roller bearing according to claim 1, wherein an outer peripheral surface of said small diameter side flange is formed in a tapered shape having a smaller diameter toward an outer end side. . 14. An inner ring having a tapered raceway surface on the outer peripheral side, an outer ring having a tapered raceway surface on the inner peripheral surface, and a plurality of tapered rollers interposed between the inner race and the outer race. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter-side end face of the roller, and after fitting the tapered roller into the pocket of the metal cage from the inside, the inner ring is moved to the large size of the metal cage. By inserting from the radial end, the inner ring of the tapered roller A tapered roller bearing for assembling, wherein the same number of notches as the number of the tapered rollers formed in the small-diameter side flange are provided for passage of the tapered rollers held by the metal cage. bearing. 15. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter end portion, the inner surface of which faces the small-diameter side end surface of the tapered roller; An outer flange-shaped large-diameter flange facing the large-diameter end face of the roller, and after inserting the inner ring into the metal cage, the tapered roller is inserted into a pocket of the metal cage from an outer peripheral side. By fitting the tapered roller to the inner ring. A tapered roller bearing, wherein the metal cage has a diameter larger than a pitch circle diameter of the tapered rollers rolled on the raceway of the inner ring, and has a large-diameter end and a small-diameter end of the pocket. A tapered roller bearing having an enlarged portion. 16. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner race and the outer race. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter side end, the inner surface of which faces the small-diameter side end surface of the tapered roller, and a large-diameter side end of the inner ring, the inner surface of which is formed in the conical shape. An outer flange-shaped large-diameter flange facing the large-diameter end face of the roller, and after inserting the inner ring into the metal cage, the tapered roller is inserted into a pocket of the metal cage from an outer peripheral side. By fitting the tapered roller to the inner ring. A tapered roller bearing, tapered roller, characterized in that projecting on the outer peripheral side in the axial direction central portion of the metal retainer bearing performed. 17. An inner ring having a tapered raceway surface on an outer peripheral side, an outer ring having a tapered raceway surface on an inner peripheral surface, and a plurality of tapered rollers interposed between the inner ring and the outer ring. A tapered metal retainer having a plurality of pockets provided for holding these tapered rollers, and supporting the tapered rollers so as to roll freely between the inner ring and the outer ring; and A small-diameter side flange formed in the small-diameter side end, the inner surface of which faces the small-diameter side end face of the tapered roller, and a small-diameter side flange formed on the small-diameter side end of the inner ring; For the tapered roller bearing having an outward flange-shaped small-diameter side flange facing the small-diameter side end face of the metal retainer, the inner ring is made of metal after the tapered rollers are fitted into the pockets of the metal cage from the inside. Insert from the large-diameter end of the The method for assembling a tapered roller bearing includes a step of causing the metal cage and the inner ring to approach each other in the axial direction, thereby causing the tapered rollers to ride over the small-diameter side flange and assembling the tapered rollers to the inner ring. Prior to inserting the inner ring from the large-diameter side end of the metal cage, a small-diameter tapered roller held by the metal cage by inserting a diameter expanding means into the metal cage. Pressing the end outward, and then pressing the tapered rollers protruding from the metal cage against the large-diameter end surface of the pocket by pressing means, and locking the large-diameter side end of the metal cage by locking means. A method for assembling a tapered roller bearing, characterized by locking.